357 lines
9.5 KiB
HTML
357 lines
9.5 KiB
HTML
<!--
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Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
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This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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Code distributed by Google as part of the polymer project is also
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subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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-->
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<!--
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`paper-slider` allows user to select a value from a range of values by
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moving the slider thumb. The interactive nature of the slider makes it a
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great choice for settings that reflect intensity levels, such as volume,
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brightness, or color saturation.
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Example:
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<paper-slider></paper-slider>
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Use `min` and `max` to specify the slider range. Default is 0 to 100.
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Example:
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<paper-slider min="10" max="200" value="110"></paper-slider>
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Styling slider:
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To change the slider progress bar color:
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paper-slider::shadow #sliderBar::shadow #activeProgress {
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background-color: #0f9d58;
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}
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To change the slider knob color:
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paper-slider::shadow #sliderKnobInner {
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background-color: #0f9d58;
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}
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To change the slider pin color:
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paper-slider::shadow #sliderKnobInner::before {
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background-color: #0f9d58;
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}
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To change the slider pin's font color:
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paper-slider::shadow #sliderKnob > #sliderKnobInner::after {
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color: #0f9d58
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}
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To change the slider secondary progress bar color:
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paper-slider::shadow #sliderBar::shadow #secondaryProgress {
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background-color: #0f9d58;
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}
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@group Paper Elements
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@element paper-slider
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@extends core-range
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@homepage github.io
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-->
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<link rel="import" href="../core-a11y-keys/core-a11y-keys.html">
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<link rel="import" href="../paper-progress/paper-progress.html">
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<link rel="import" href="../paper-input/paper-input.html">
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<polymer-element name="paper-slider" extends="core-range" attributes="snaps pin disabled secondaryProgress editable immediateValue" role="slider" tabindex="0" aria-valuemin="0" aria-valuemax="100">
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<template>
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<link rel="stylesheet" href="paper-slider.css">
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<template if="{{!disabled}}">
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<core-a11y-keys target="{{}}" keys="left down pagedown home" on-keys-pressed="{{decrementKey}}"></core-a11y-keys>
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<core-a11y-keys target="{{}}" keys="right up pageup end" on-keys-pressed="{{incrementKey}}"></core-a11y-keys>
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</template>
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<div id="sliderContainer" class="{{ {disabled: disabled, pin: pin, snaps: snaps, ring: immediateValue <= min, expand: expand, dragging: dragging, transiting: transiting, editable: editable} | tokenList }}">
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<div class="bar-container">
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<paper-progress id="sliderBar" aria-hidden="true" min="{{min}}" max="{{max}}" value="{{immediateValue}}" secondaryProgress="{{secondaryProgress}}"
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on-down="{{bardown}}" on-up="{{resetKnob}}"
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on-trackstart="{{trackStart}}" on-trackx="{{trackx}}" on-trackend="{{trackEnd}}"></paper-progress>
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</div>
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<template if="{{snaps && !disabled}}">
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<div class="slider-markers" horizontal layout>
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<template repeat="{{markers}}">
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<div flex class="slider-marker"></div>
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</template>
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</div>
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</template>
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<div id="sliderKnob" on-down="{{knobdown}}" on-up="{{resetKnob}}"
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on-trackstart="{{trackStart}}" on-trackx="{{trackx}}" on-trackend="{{trackEnd}}"
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on-transitionend="{{knobTransitionEnd}}"
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center-justified center horizontal layout>
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<div id="sliderKnobInner" value="{{immediateValue}}"></div>
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</div>
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</div>
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<template if="{{editable}}">
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<paper-input id="input" class="slider-input" value="{{immediateValue}}" disabled?="{{disabled}}" on-change="{{inputChange}}"></paper-input>
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</template>
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</template>
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<script>
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Polymer('paper-slider', {
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/**
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* Fired when the slider's value changes.
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*
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* @event core-change
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*/
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/**
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* Fired when the slider's immediateValue changes.
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*
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* @event immediate-value-change
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*/
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/**
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* Fired when the slider's value changes due to user interaction.
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*
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* Changes to the slider's value due to changes in an underlying
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* bound variable will not trigger this event.
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*
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* @event change
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*/
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/**
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* If true, the slider thumb snaps to tick marks evenly spaced based
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* on the `step` property value.
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*
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* @attribute snaps
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* @type boolean
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* @default false
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*/
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snaps: false,
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/**
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* If true, a pin with numeric value label is shown when the slider thumb
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* is pressed. Use for settings for which users need to know the exact
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* value of the setting.
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*
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* @attribute pin
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* @type boolean
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* @default false
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*/
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pin: false,
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/**
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* If true, this slider is disabled. A disabled slider cannot be tapped
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* or dragged to change the slider value.
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*
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* @attribute disabled
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* @type boolean
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* @default false
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*/
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disabled: false,
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/**
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* The number that represents the current secondary progress.
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*
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* @attribute secondaryProgress
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* @type number
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* @default 0
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*/
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secondaryProgress: 0,
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/**
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* If true, an input is shown and user can use it to set the slider value.
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*
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* @attribute editable
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* @type boolean
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* @default false
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*/
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editable: false,
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/**
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* The immediate value of the slider. This value is updated while the user
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* is dragging the slider.
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*
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* @attribute immediateValue
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* @type number
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* @default 0
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*/
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maxMarkers: 100,
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observe: {
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'step snaps': 'update'
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},
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ready: function() {
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this.update();
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},
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update: function() {
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this.positionKnob(this.calcRatio(this.value));
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this.updateMarkers();
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},
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minChanged: function() {
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this.update();
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this.setAttribute('aria-valuemin', this.min);
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},
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maxChanged: function() {
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this.update();
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this.setAttribute('aria-valuemax', this.max);
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},
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valueChanged: function() {
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this.update();
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this.setAttribute('aria-valuenow', this.value);
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this.fire('core-change');
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},
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disabledChanged: function() {
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if (this.disabled) {
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this.removeAttribute('tabindex');
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} else {
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this.tabIndex = 0;
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}
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},
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immediateValueChanged: function() {
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if (!this.dragging) {
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this.value = this.immediateValue;
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}
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this.fire('immediate-value-change');
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},
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expandKnob: function() {
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this.expand = true;
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},
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resetKnob: function() {
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this.expandJob && this.expandJob.stop();
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this.expand = false;
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},
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positionKnob: function(ratio) {
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this.immediateValue = this.calcStep(this.calcKnobPosition(ratio)) || 0;
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this._ratio = this.snaps ? this.calcRatio(this.immediateValue) : ratio;
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this.$.sliderKnob.style.left = this._ratio * 100 + '%';
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},
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inputChange: function() {
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this.value = this.$.input.value;
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this.fire('change');
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},
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calcKnobPosition: function(ratio) {
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return (this.max - this.min) * ratio + this.min;
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},
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trackStart: function(e) {
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this._w = this.$.sliderBar.offsetWidth;
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this._x = this._ratio * this._w;
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this._startx = this._x || 0;
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this._minx = - this._startx;
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this._maxx = this._w - this._startx;
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this.$.sliderKnob.classList.add('dragging');
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this.dragging = true;
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e.preventTap();
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},
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trackx: function(e) {
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var x = Math.min(this._maxx, Math.max(this._minx, e.dx));
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this._x = this._startx + x;
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this.immediateValue = this.calcStep(
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this.calcKnobPosition(this._x / this._w)) || 0;
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var s = this.$.sliderKnob.style;
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s.transform = s.webkitTransform = 'translate3d(' + (this.snaps ?
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(this.calcRatio(this.immediateValue) * this._w) - this._startx : x) + 'px, 0, 0)';
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},
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trackEnd: function() {
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var s = this.$.sliderKnob.style;
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s.transform = s.webkitTransform = '';
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this.$.sliderKnob.classList.remove('dragging');
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this.dragging = false;
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this.resetKnob();
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this.value = this.immediateValue;
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this.fire('change');
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},
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knobdown: function(e) {
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e.preventDefault();
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this.expandKnob();
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},
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bardown: function(e) {
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e.preventDefault();
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this.transiting = true;
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this._w = this.$.sliderBar.offsetWidth;
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var rect = this.$.sliderBar.getBoundingClientRect();
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var ratio = (e.x - rect.left) / this._w;
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this.positionKnob(ratio);
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this.expandJob = this.job(this.expandJob, this.expandKnob, 60);
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this.fire('change');
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},
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knobTransitionEnd: function(e) {
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if (e.target === this.$.sliderKnob) {
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this.transiting = false;
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}
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},
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updateMarkers: function() {
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this.markers = [];
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var l = (this.max - this.min) / this.step;
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if (!this.snaps && l > this.maxMarkers) {
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return;
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}
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for (var i = 0; i < l; i++) {
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this.markers.push('');
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}
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},
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increment: function() {
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this.value = this.clampValue(this.value + this.step);
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},
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decrement: function() {
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this.value = this.clampValue(this.value - this.step);
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},
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incrementKey: function(ev, keys) {
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if (keys.key === "end") {
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this.value = this.max;
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} else {
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this.increment();
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}
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this.fire('change');
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},
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decrementKey: function(ev, keys) {
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if (keys.key === "home") {
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this.value = this.min;
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} else {
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this.decrement();
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}
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this.fire('change');
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}
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});
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</script>
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</polymer-element>
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